// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef MILVUS_THREADPOOLS_H
#define MILVUS_THREADPOOLS_H

#include "ThreadPool.h"

namespace milvus {

enum ThreadPoolPriority {
    HIGH = 0,
    MIDDLE = 1,
    LOW = 2,
    CHUNKCACHE = 3,
};

class ThreadPools {
 public:
    static ThreadPool&
    GetThreadPool(ThreadPoolPriority priority);

    static void
    ResizeThreadPool(ThreadPoolPriority priority, float ratio);

    static void
    ShutDown();

 private:
    static std::map<ThreadPoolPriority, std::string>
    name_map() {
        static std::map<ThreadPoolPriority, std::string> name_map = {
            {HIGH, "HIGH_SEGC_POOL"},
            {MIDDLE, "MIDD_SEGC_POOL"},
            {LOW, "LOW_SEGC_POOL"},
            {CHUNKCACHE, "CHUNKCACHE_SEGC_POOL"}};
        return name_map;
    }

    static std::map<ThreadPoolPriority, std::unique_ptr<ThreadPool>>
        thread_pool_map;
    static std::shared_mutex mutex_;
};

}  // namespace milvus

#endif  //MILVUS_THREADPOOLS_H
